# SDR DALA2026050502838

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 2, 2026
- Submitted: May 5, 2026
- Operation: Air carrier
- Aircraft: [N906DN](https://openairdocs.org/aircraft/N906DN), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 64879
- Aircraft time: 23,914 hours, 9,598 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Inoperative
- Location: Zone 200
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2026050502838

## Discrepancy

FIRST CLASS OVER HEAD EMERGENCY EXIT AND FWD LH OVERWING EMERGENCY LIGHT INOPERATIVE. REPLACED THE LH MIDDLE POWER SUPPLY PER B737 AMM 33-51. OPS CHECK GOOD. (LOG 1573930 - AIRCRAFT WAS GROUNDED).

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